Grace y su amiga Judith salen a dar un paseo a caballo y son atropelladas por un tráiler. Judith y su caballo mueren, mientras que Grace y el suyo resultan gravemente heridos. En un intento desesperado por recuperar a Pilgrim que, desde el accidente, se ha convertido en un caballo salvaje, Anie, la madre de Grace, decide ir a Montana a ver a Tom Booker, un vaquero que posee un don especial para hablar y curar a los caballos.

The book differs from the movie, which did a fair treatment of the trauma suffered by the young girl (she is not exactly the protagonist; I'm not sure who is). Segues into the relationship of her mother and the "horse whisperer" which upstages the girl's recovery even more than it does in the book.
Go to a non-fiction memoir of the real-life "horse whisperers" for a better story.
Or see this documentary about one of the trainers who assisted in the movie, and also another trainer Monty Roberts:
https://www.theguardian.com/film/2011/jun/26/true-story-horse-whisperer-buck-bra...

Monty Roberts: A Real Horse Whisperer (1998)
https://www.imdb.com/title/tt0472232/

Wikipedia:
The main character, according to writer Nicholas Evans,[4] is modeled after horse whisperers Tom Dorrance, Ray Hunt and, in particular, their younger disciple Buck Brannaman.[5] Brannaman also doubled for Robert Redford in the film and served as the consultant. Redford likewise assisted in the production of the documentary Buck. Evans said, "Others have claimed to be the inspiration for Tom Booker in The Horse Whisperer. The one who truly inspired me was Buck Brannaman. His skill, understanding and his gentle, loving heart have parted the clouds for countless troubled creatures. Buck is the Zen master of the horse world."[5]

(Following caveats about unlikely events and unsafe techniques depicted in the movie): Lyons' critique also recognized the limitations of Hollywood film-making, stating, "In order to tell a story, things are often done that would be imprudent for horse owners to attempt."[7] ( )